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ABSTRACT: Water surface is one of the most important components of landscape scenes. When rendering spacious water surface such as that
of the lakes and reservoirs, aliasing and/or moiré artifacts frequently occur in the regious far from the viewpoint. This
is because water surface consists of stochastic water waves which are usually modeled by periodic bump mapping. The incident
rays on the water surface are actually scattered by the bumped waves, and the reflected rays at each sample point are distributed
in a solid angle. To get rid of the artifacts of moiré pattern, we estimate this solid angle of reflected rays and trace these
rays. An image-based accelerating method is adopted so that the contribution of each reflected ray can be quickly obtained
without elaborate intersection calculation. We also demonstrate anti-aliased shadows of sunlight and skylight on the water
surface. Both the rendered images and animations show excellent effects on the water surface of a reservoir.
Journal of Computer Science and Technology 08/2004; 19(5):626-632. · 0.56 Impact Factor
